Door-spring.



1. F. .swlr. ADOOR SPRING APPLICATION LED DEC- 15 1916- Lm Patented Apr., 23,1918,

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nstnrsrrrnr; cnnansass crier, .1 Massenet; i `i 1 `ncaa:enema p y o application filed December 15,191erjseriarnierric l To .all whom @may concern.' i Be it lino' tltl 1, Jamas Fl Swirl?, a citizen of the United States, residing at Kansas City, iny the county of Jackson and State ofMissouri, have invented ak certain new and useful Improvement" in Door- Springs, of which the following is a speci-` cation. Y

My invention relates door springs. i Y v The object of my invention is to providel a novel spring mechanism,'particularly adapted for use in `closing doors, whichV is arranged so as to exert relatively great leverf age power with a spring of` minimum strength and size, which is economical to manufacture and easily attached to a door `to `improvements in by an inexperienced person,`which is not liable to get out of order, is durable, and which will readily swing the door when it has been swung to the fully open position.

Y My improved door spring is adapted to be substituted for the usual spring hinges and for the ordinary long coil spring which is commonly used for such purposes, and

which is not adapted to close the door' when the latter has been swung to the fully open position. @wing `to its construction and to the manner in which it is attached to a door, a much weakerA and smallerfspringv is required in my improved spring mechanism than is required in spring hinges or the usual long coil spring above referred to.

The novel Jfeatures of my invention fare hereinafter fully described andclaimed.

1n `the accompanying drawing, which l illustrates the preferred embodiment of imy invention, y

Figure 1 is an inside elevation of a portion of a door and its frame, having attached thereto my improved door spring mechanism. Y v y ll? ig. 2 is a horizontal 'section v on the` line am of rig. i. l

lig. 3 is an enlarged'horizontal sectional view on the linev 3-3 of Fig 1.y

Similar reference characters designate similar parts in the diderent views.

1 designates a hinge member adapted vto be secured, as by screws 2, to the inner side and central portion of a door 3.

A swinging member 4 is pivoted tothe member 1 by a vertical pintle 5. The swinging member 4 is preferably provided with two arms 6. disposed one above the other and having extending therethrough averticalpin 7. A connecting mechanism,

preferably flexible, is attachedto the@ pim i fandto a door jamb 8 at the inner side of the door 3. This connecting `mechanism preferably constitutes a horizontal rod 9 'having atoneend al `hook 10 which em` braces `the pin 7 intermediate of the arms f 4.ie'atalten; anal alla, mi*

6, the hook preferably being open, as shown,

to permit the ready detachment thereof from the pin. rll`he other end of the rod 9 isprovided with a hook 11,l which pivotally en-` gages the` apex of 'a ll-shaped member 12 having hooked ends which respectivel pivotally engage screw eyes 13 secured 1n the' adjacent jarnb 8 at theinnerfside of the door 3. i

Enea-Cling the pin 7, preferably atboeh sides of therod 9, between the arms 6, is a coil spring 14, the middle portion of which bears 'against the rod 9 and the ends of` whichbearrespectively against thearms 6. The arrangement and tension of the spring 14 is such` that it will normally force the i member 4 toward the door. v

When the door is opened, it will pull against the rod` 9 and member 12, thereby increasing the tension of the spring 14.

Upon releasing the door, said spring will force the door to the initialclosed position shown in Fig. 2.' If the door is swung to the Afully open position, which may be effected, dueto the flexibility of the connecting mechanism 9 and 12, the spring will still draw the door to the closed position, the member 12 being of sufficient length 'to permit the rod 9 to have a straight pull upon thepin 7 Owing to the hinge member 1 being at- `tached tothe door, near the middle thereof,

and owing to the hinge, connection between the members land 4, great leverage power is exerted by the device tending to close the door, andtherefore, a relatively short and weak spring may be employed.

While I have shown and describedmy invention, as applied to a door, it will be obbvious that it may be usedy for forcing other closures to the closed position.

I do not limit my invention to the strucroc ture shown and described, as modifications,-

may be made without departing from the spirit of my invention.

\ What I claim is In a door spring, a hinge comprising a" within the scope of the appended claim, .i

swinging member having two arms, and a. A

to -be secured to av door jamb, a pin carried by? theV arms said A swinging member, a' connecting member `hav-ing @Wo ho0ksrevspectiveiy engaging said pin and said vV- ,shaped'anchoringmember,y anda coil spring 10 encircling said pm and having its ends bearingi respectively against the arms of said swinging member and having a middle portion bearing against said connecting member.

In testimony whereof I have signed my 15 name tothis specication.

`JAMES, r. SWIFT.

ionica hie' Qbcainediforfiivejcents each, by addressing the Gmmissionef of Patenti,`

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